/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.beans.factory.parsing;

import org.springframework.beans.BeanMetadataElement;
import org.springframework.core.io.Resource;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;

/**
 * Representation of an import that has been processed during the parsing process.
 *
 * @author Juergen Hoeller
 * @see ReaderEventListener#importProcessed(ImportDefinition)
 * @since 2.0
 */
public class ImportDefinition implements BeanMetadataElement {

    private final String importedResource;

    @Nullable
    private final Resource[] actualResources;

    @Nullable
    private final Object source;


    /**
     * Create a new ImportDefinition.
     *
     * @param importedResource the location of the imported resource
     */
    public ImportDefinition(String importedResource) {
        this(importedResource, null, null);
    }

    /**
     * Create a new ImportDefinition.
     *
     * @param importedResource the location of the imported resource
     * @param source           the source object (may be {@code null})
     */
    public ImportDefinition(String importedResource, @Nullable Object source) {
        this(importedResource, null, source);
    }

    /**
     * Create a new ImportDefinition.
     *
     * @param importedResource the location of the imported resource
     * @param source           the source object (may be {@code null})
     */
    public ImportDefinition(String importedResource, @Nullable Resource[] actualResources, @Nullable Object source) {
        Assert.notNull(importedResource, "Imported resource must not be null");
        this.importedResource = importedResource;
        this.actualResources = actualResources;
        this.source = source;
    }


    /**
     * Return the location of the imported resource.
     */
    public final String getImportedResource() {
        return this.importedResource;
    }

    @Nullable
    public final Resource[] getActualResources() {
        return this.actualResources;
    }

    @Override
    @Nullable
    public final Object getSource() {
        return this.source;
    }

}
